https://www.cheggindia.com/general-knowledge/uses-of-galvanometer/
"Introduction: What is a Galvanometer?
A galvanometer is a device. The galvanometer detects and measures electric current among its many uses. It’s like bronze is an alloy of copper and tin designed for a specific purpose. The galvanometer is designed to work with electrical circuits. The galvanometer definition is simple: it’s a tool that tells us if electric current is flowing and how much is flowing.
Introduction to Galvanometers and Their Fundamental Principles
Galvanometers work on the principle of moving coil galvanometers. When current passes through a coil it creates a magnetic field. This field interacts with another magnetic field in the device. The coil moves, and it shows this movement on a scale. This is the working of a moving coil galvanometer. The principle of a galvanometer is all about this interaction between electric current and magnetic fields.
Significance of Galvanometers in Various Fields of Science and Technology
Galvanometers are not just for electricians or labs. Many areas utilize them. For example, medicine utilizes them in making ECG machines. Physics labs use galvanometers to measure small currents. Industries use them to check circuits. The galvanometer serves various purposes. It’s a tool that has a big role in science and tech."